CN110566147A - Equipment and method for adopting coal core for low-temperature gas medium cooling drill bit - Google Patents
Equipment and method for adopting coal core for low-temperature gas medium cooling drill bit Download PDFInfo
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- CN110566147A CN110566147A CN201910840333.8A CN201910840333A CN110566147A CN 110566147 A CN110566147 A CN 110566147A CN 201910840333 A CN201910840333 A CN 201910840333A CN 110566147 A CN110566147 A CN 110566147A
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- 239000003245 coal Substances 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 118
- 238000005553 drilling Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 9
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 239000011435 rock Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 10
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 4
- 239000011162 core material Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 239000010878 waste rock Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000003795 desorption Methods 0.000 abstract description 4
- 244000025254 Cannabis sativa Species 0.000 description 4
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 4
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 4
- 235000009120 camo Nutrition 0.000 description 4
- 235000005607 chanvre indien Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011487 hemp Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Soil Sciences (AREA)
- Sampling And Sample Adjustment (AREA)
- Earth Drilling (AREA)
Abstract
the invention discloses a device and a method for adopting a coal core for a low-temperature gas medium cooling drill bit, wherein the coring device comprises a low-temperature medium storage tank, a low-temperature gas buffer tank, a compressed air system, a drilling machine, a drill rod and a drill bit; the core technical points of the method are as follows: after a low-temperature medium (liquid nitrogen or liquid carbon dioxide) in the low-temperature medium storage tank enters the low-temperature gas buffer tank, the low-temperature gas enters the low-temperature gas pipeline and the gas outlet pipeline from the low-temperature gas buffer tank to cool the drill bit by utilizing the pressure generated by the low-temperature phase change of the liquid medium, so that the purpose of low-temperature coal core taking is achieved, the problems that the desorption of coal sample gas is too fast and the leakage amount is large due to the fact that the drill bit generates heat by friction with a coal bed in the coal core taking process are solved, and the accuracy of the measured value of the gas content of.
Description
Technical Field
The invention relates to the field of coal bed coring, in particular to a device and a method for adopting a coal core for a low-temperature gas medium cooling drill bit.
Background
china is a large coal resource country and a large coal consumption country, deep mining of coal resources becomes a new normal state along with the progress of mining activities, gas of deep buried coal beds is abundant, and gas disasters are more serious. According to statistics, the high gas mine and the mine with gas outburst danger in China account for 30% of the total amount of the mine in China, and the high frequency of heavy and extra-large gas accidents is not fundamentally solved, so that the smooth operation of the safe production work in China is seriously hindered. Therefore, the coal mine gas disaster treatment work is imperative.
the coal bed gas content is not only an indispensable basic parameter for coal bed gas resource exploration and development, but also a main index for testing the effect of regional outburst prevention measures. The coal bed gas content determines the grade of the mine gas, and the mine gas emission quantity is an important basis for predicting the mine gas emission quantity and the coal bed outburst risk.
At present, the method for measuring the gas content of the underground coal seam mainly comprises an indirect method and a direct method, and the direct method is generally adopted at a coal mine site. In the coring process, due to the cutting of the coring bit on the coal wall, the drilling rotation of the coring bit and the friction of the hole wall, the temperature of the coal sample in the coring bit and the pipe is increased, so that the gas desorption is accelerated, the leakage amount is increased, the accuracy of a gas content measurement value is influenced, and serious economic loss can be caused to the country.
Disclosure of Invention
the invention aims to overcome the defects of the prior art and provides equipment and a method for adopting a coal core for a low-temperature gas medium cooling drill bit so as to solve the problems in the technical background.
The purpose of the invention is realized by the following technical scheme:
A low-temperature gas medium cooling drill bit adopts coal core equipment, which comprises a low-temperature medium storage tank, a low-temperature gas buffer tank, a compressed air system, a drilling machine, a drill rod and a drill bit; the low-temperature medium storage tank is sequentially connected with the low-temperature gas buffer tank and the drilling machine through pipelines; the compressed air system is connected with the drilling machine through a pipeline, and the drill bit is connected with the drilling machine through a drill rod.
Further, the drill comprises a hollow drill and a hemp flower type drill; the drill rod comprises a first drill rod and a second drill rod, one end of the hollow drill bit and one end of the twist drill bit are respectively provided with a threaded connector, and the other end of the hollow drill bit and the other end of the twist drill bit are respectively provided with diamond drill particles; the hollow drill bit and the twist drill bit are respectively in threaded connection with one end of the first drill rod and one end of the second drill rod through threaded connectors; the other ends of the first drill rod and the second drill rod are connected with a drilling machine; the circumference of the outer wall of the first drill rod and the inside of the second drill rod are respectively provided with a low-temperature gas pipeline; the circumference of the hollow drill bit and the inside of the hemp flower type drill bit are respectively provided with an air outlet pipeline; the low-temperature gas pipeline and the gas outlet pipeline are communicated with each other.
Furthermore, a first valve is arranged on a connecting pipeline between the low-temperature medium storage tank and the low-temperature gas buffer tank; a second valve is arranged on a connecting pipeline between the low-temperature gas buffer tank and the drilling machine; and a third valve are arranged on a connecting pipeline between the compressed air system and the drilling machine.
furthermore, a pressure gauge, a thermometer and a pressure release valve are respectively arranged on the low-temperature gas buffer tank and used for monitoring the pressure and the temperature of the low-temperature gas in the low-temperature gas buffer tank, and when the pressure is too high, part of the gas can be released by the pressure release valve to reduce the pressure in the tank.
Furthermore, the low-temperature medium in the low-temperature medium storage tank is liquid nitrogen or liquid carbon dioxide, and the liquid nitrogen or the liquid carbon dioxide has the advantages of simple preparation, wide raw material source and the like, and the running cost of equipment is reduced.
Furthermore, the low-temperature gas medium cooling drill bit coal core sampling equipment further comprises a coal sample collector, and the coal sample collector is used for collecting the sampled coal cores.
A method for adopting a coal core for a low-temperature gas medium cooling drill bit comprises the following steps:
S1, arranging hole sites on rock stratums of rock gates, rock roadways or newly exposed excavation faces which are not subjected to gas extraction, wherein at least two sampling drill holes are arranged at the same place, and the distance between the two renting drill holes is not less than 5 m;
s2, selecting different drill rods and drill bits according to the types of coring and installing the drill rods and the drill bits on a drilling machine;
s3, aligning the drill bit with the arranged hole site, opening a third valve, providing drilling power for the drilling machine by using a compressed air system to start drilling the rock stratum, and taking the coal core in the coal seam;
s4, opening the first valve and the second valve, and enabling low-temperature gas to enter a low-temperature gas pipeline and a gas outlet pipeline from the low-temperature gas buffer tank to cool the drill bit by utilizing pressure generated by low-temperature phase change of the liquid medium;
s5, taking out the coal core, and taking out a complete part with little gangue in the middle of the columnar coal core; for powdery and blocky coal cores, waste rock, soil and ground coke burning parts are removed, and the coal cores are loaded into a coal sample collector in a natural state.
Further, in the step S2, when the cylindrical coal core needs to be adopted, a hollow drill bit and a first drill rod are used; when the powdered coal core needs to be adopted, a hemp flower type drill bit and a second drill rod are used.
Further, in step S3, when core drilling is performed, the core drilling length is not less than 0.4 m.
The invention has the beneficial effects that: the invention combines the cooling of low-temperature gas medium with the coal core sampling device, the drill bit simultaneously performs the coal core sampling and the low-temperature gas discharge, and the inhibition effect of low temperature on the coal sample gas desorption in the coal core sampling process is utilized, so that the problems of too fast coal sample gas desorption and large leakage amount caused by the frictional heat generation of the drill bit and the coal bed in the coal core sampling process can be effectively reduced, and the accuracy of the coal bed gas content measuring value can be improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the configuration of the hollow drill bit and the first drill rod of the present invention;
FIG. 3 is a schematic structural view of a twist-type drill bit and a second drill rod of the present invention.
In the figure, 1-coal bed, 2-rock stratum, 3-drill bit, 4-drill rod, 5-coal sample collector, 6-drilling machine, 7-compressed air system, 8-third valve, 9-second valve, 10-pressure gauge, 11-thermometer, 12-pressure relief valve, 13-low-temperature gas buffer tank, 14-first valve, 15-low-temperature medium storage tank, 16-threaded connector, 17-diamond granule, 18-low-temperature gas pipeline, 19-gas outlet pipeline, 31-hollow drill bit, 32-twist drill bit, 41-first drill rod and 42-second drill rod.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example (b):
a low-temperature gas medium cooling drill bit adopts coal core equipment, please refer to attached figures 1-2, and comprises a low-temperature medium storage tank 15, a low-temperature gas buffer tank 13, a compressed air system 7, a drilling machine 6, a drill rod 4 and a drill bit 3; the low-temperature medium storage tank 15 is sequentially connected with the low-temperature gas buffer tank 13 and the drilling machine 6 through pipelines; the compressed air system 7 is connected with the drilling machine 6 through a pipeline; the drill bit 3 is connected to a drilling machine 6 via a drill rod 4.
Further, in order to meet the requirement that the invention can adopt different types of coal cores, the drill 3 comprises a hollow drill 31 and a twist drill 32; the hollow drill 31 is used for taking a columnar coal core, the twist drill 32 is used for taking a powdery coal core, the drill rod 4 comprises a first drill rod 41 and a second drill rod 42, one end of each of the hollow drill 31 and the twist drill 32 is provided with a threaded connector 16, and the other end of each of the hollow drill 31 and the twist drill 32 is provided with diamond drill particles 17; the hollow drill 31 and the twist drill 32 are respectively in threaded connection with one ends of a first drill rod 41 and a second drill rod 42 through the threaded connectors 16; the other ends of the first drill rod 41 and the second drill rod 42 are connected with the drilling machine 6; the circumference of the outer wall of the first drill rod 41 and the inside of the second drill rod 42 are respectively provided with a low-temperature gas pipeline 18; the circumference of the hollow drill 31 and the inside of the hemp-flower type drill 32 are respectively provided with an air outlet pipeline 19; the low-temperature gas pipeline 18 and the gas outlet pipeline 19 are communicated with each other; a first valve 14 is arranged on a connecting pipeline between the low-temperature medium storage tank 15 and the low-temperature gas buffer tank 13; a second valve 8 is arranged on a connecting pipeline between the low-temperature gas buffer tank 13 and the drilling machine 6; and a third valve 8 is arranged on a connecting pipeline between the compressed air system 7 and the drilling machine 6.
Furthermore, the equipment for taking the coal core by the low-temperature gas medium cooling drill bit further comprises a coal sample collector 5, and the coal sample collector 5 is used for collecting the taken coal core.
preferably, the low-temperature gas buffer tank 13 is provided with a pressure gauge 10, a temperature gauge 11 and a pressure release valve 12, which are used for monitoring the pressure and the temperature of the low-temperature gas in the low-temperature gas buffer tank 13, when the pressure is too high, part of the gas can be released by the pressure release valve to reduce the pressure in the tank, and when the temperature in the tank is too high, the flow rate of the low-temperature medium can be increased by the first valve 14.
Preferably, the low-temperature medium in the low-temperature medium storage tank 15 is liquid nitrogen or liquid carbon dioxide, the liquid nitrogen or the liquid carbon dioxide has the advantages of simple preparation, wide raw material source and the like, the temperature of the liquid nitrogen/the liquid carbon dioxide can reach-196 ℃ and/or 37 ℃ under normal pressure, the temperature of the coal core can be rapidly reduced to below 0 ℃ by gasifying the liquid nitrogen/the liquid carbon dioxide into the low-temperature gas medium, and the operation cost of equipment is reduced.
a method for adopting a coal core for a low-temperature gas medium cooling drill bit comprises the following steps:
s1, arranging hole sites on rock stratums of rock gates, rock roadways or newly exposed excavation faces which are not subjected to gas extraction, wherein at least two sampling drill holes are arranged at the same place, and the distance between the two renting drill holes is not less than 5 m;
S2, selecting different drill rods and drill bits according to the types of coring and installing the drill rods and the drill bits on a drilling machine;
S3, aligning the drill bit with the arranged hole site, opening a third valve, providing drilling power for the drilling machine by using a compressed air system to start drilling the rock stratum, and taking the coal core in the coal seam;
s4, opening the first valve and the second valve, and enabling low-temperature gas to enter a low-temperature gas pipeline and a gas outlet pipeline from the low-temperature gas buffer tank to cool the drill bit by utilizing pressure generated by low-temperature phase change of the liquid medium;
S5, taking out the coal core, and taking out a complete part with little gangue in the middle of the columnar coal core; for powdery and blocky coal cores, waste rock, soil and ground coke burning parts are removed, and the coal cores are loaded into a coal sample collector in a natural state.
Further, in the step S2, when the cylindrical coal core needs to be adopted, a hollow drill bit and a first drill rod are used; when the powdered coal core needs to be adopted, a hemp flower type drill bit and a second drill rod are used.
Further, in step S3, when core drilling is performed, the core drilling length is not less than 0.4 m.
When the low-temperature gas conversion device is used, a first valve 14 is opened, and low-temperature media (liquid nitrogen and liquid carbon dioxide) in a low-temperature medium storage tank 15 are conveyed to a low-temperature gas buffer tank 13 through a pipeline to be converted into low-temperature gas; the low-temperature gas buffer tank 13 is provided with a low-temperature gas pressure gauge 10, a low-temperature gas temperature gauge 11 and a gas pressure release valve 12, so that the pressure and the temperature of gas in the tank can be monitored in real time, when the gas pressure in the tank is too high, partial gas can be released through the pressure release valve 12, when the temperature in the tank is too high, the flow rate of a low-temperature medium can be increased through a first valve 14, more low-temperature medium absorbs heat in the vaporization process, and the temperature in the tank is reduced; and opening the second valve 9, conveying low-temperature gas from a low-temperature gas buffer tank (13) to the drilling machine 6 through a pipeline due to pressure generated by phase change of the liquid low-temperature medium, discharging the low-temperature gas from a gas outlet 19 on the drill bit 3 through a low-temperature gas pipeline 18 on the drill rod 4, and simultaneously performing the coal core drilling process and the low-temperature gas discharging process on the drill bit 3 so as to achieve the purpose of drilling at low temperature to take the coal core. After taking out the coal core, taking out a complete part with less gangue in the middle for the columnar coal core; for powdery and blocky coal cores, waste rock, soil and ground coke burning parts need to be removed, coal samples do not need to be cleaned by water, the coal samples are kept in a natural state and are loaded into a coal sample collector 5 and cannot be compacted, and gaps of about 10mm are reserved at a tank opening.
referring to fig. 2 and 3, the drill bit (3) is a hollow type drill bit 31 for drilling a cylindrical or block coal sample; one is a twist drill 32 for drilling a coal sample in powder form. Hollow type drill 31 and twist drill 32 are all gone up and are all had diamond drill granule 17 and gas outlet 19 respectively, hollow type drill 31 and twist drill 32 are connected with first drilling rod and second drilling rod through threaded connection 16 respectively, be equipped with low temperature gas pipeline 18 on the outer wall circumference of first drilling rod 41 and the inside of second drilling rod 42 respectively, be equipped with gas outlet pipe 19 on the circumference of hollow type drill 31 and the inside of twist drill 32 respectively, low temperature gas passes through low temperature gas pipeline 18 and discharges from gas outlet pipe 19, thereby reach the purpose to the drill cooling.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides a coal core equipment is adopted to low temperature gaseous medium cooling drill bit, includes low temperature medium storage tank (15), low temperature gas buffer tank (13), presses wind system (7), rig (6), drilling rod (4) and drill bit (3), its characterized in that, low temperature medium storage tank (15) are connected with low temperature gas buffer tank (13) and rig (6) in proper order through the pipeline, it is connected with rig (6) through the pipeline to press wind system (7), drill bit (3) are connected with rig (6) through drilling rod (4).
2. The coal core device is adopted by the low-temperature gas medium cooling drill bit as claimed in claim 1, wherein the drill bit (3) comprises a hollow drill bit (31) and a hemp-flower type drill bit (32), the drill rod (4) comprises a first drill rod (41) and a second drill rod (42), one end of the hollow drill bit (31) and one end of the hemp-flower type drill bit (32) are respectively provided with a threaded connector (16), and the other end of the hollow drill bit (31) and the other end of the hemp-flower type drill bit (32) are respectively provided with diamond grains (17); the hollow drill bit (31) and the hemp-flower type drill bit (32) are respectively in threaded connection with one ends of the first drill rod (41) and the second drill rod (42) through threaded connectors (16); the other ends of the first drill rod (41) and the second drill rod (42) are connected with a drilling machine (6); a low-temperature gas pipeline (18) is respectively arranged on the circumference of the outer wall of the first drill rod (41) and inside the second drill rod (42); and gas outlet pipelines (19) are respectively arranged on the circumference of the hollow drill bit (31) and inside the hemp-flower type drill bit (32), and the low-temperature gas pipeline (18) is communicated with the gas outlet pipelines (19).
3. the coal core equipment is characterized in that a first valve (14) is arranged on a connecting pipeline between the low-temperature medium storage tank (15) and the low-temperature gas buffer tank (13); a second valve (9) is arranged on a connecting pipeline between the low-temperature gas buffer tank (13) and the drilling machine (6); and a third valve (8) is arranged on a connecting pipeline between the compressed air system (7) and the drilling machine (6).
4. The equipment for cooling the drill bit and taking the coal core through the low-temperature gas medium is characterized in that a pressure gauge (10), a temperature gauge (11) and a pressure relief valve (12) are respectively arranged on the low-temperature gas buffer tank (13).
5. The low-temperature gas medium cooling drill bit coal core equipment as claimed in claim 1, wherein the low-temperature medium in the low-temperature medium storage tank (15) is liquid nitrogen or liquid carbon dioxide.
6. The coal core sampling device for the low-temperature gas medium cooling drill bit according to claim 1, wherein the coal core sampling device for the low-temperature gas medium cooling drill bit further comprises a coal sample collector (5), and the coal sample collector (5) is used for collecting the sampled coal core.
7. A method for adopting a coal core by a low-temperature gas medium cooling drill bit is characterized by comprising the following steps:
S1, arranging hole sites on a rock gate, a rock roadway or a newly exposed excavation working face rock stratum (2) which is not subjected to gas extraction, wherein at least two sampling drill holes are arranged at the same place, and the distance between the two renting drill holes is not less than 5 m;
S2, selecting different drill rods (4) and drill bits (3) according to the types of coring, and installing the drill rods and the drill bits on a drilling machine (6);
s3, aligning the drill bit (3) to the arranged hole site, opening a third valve (8), providing drilling power for the drilling machine (6) by using the compressed air system (7) to start drilling the rock stratum (2), and taking the coal core in the coal seam (1);
S4, opening the first valve (14) and the second valve (9), and enabling low-temperature gas to enter a low-temperature gas pipeline (18) and a gas outlet pipeline (19) from the low-temperature gas buffer tank (13) to cool the drill bit (3) by utilizing pressure generated by low-temperature phase change of the liquid medium;
S5, taking out the coal core, and taking out a complete part with little gangue in the middle of the columnar coal core; for powdery and blocky coal cores, waste rock, soil and ground coke burning parts are removed, and the coal cores are loaded into a coal sample collector (5) in a natural state.
8. The method for adopting the coal core by the low-temperature gas medium cooling drill bit as claimed in claim 7, wherein in the step S2, when the cylindrical coal core is required to be adopted, the hollow drill bit (31) and the first drill rod (41) are used; when a powdered coal core needs to be adopted, a hemp-flower type drill bit (32) and a second drill rod (42) are used.
9. The method for taking the coal core by the low-temperature gas medium cooling drill bit as claimed in claim 7, wherein in the step S3, the core taking length is not less than 0.4m when the drill hole is used for core taking.
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| CN201910840333.8A CN110566147A (en) | 2019-09-06 | 2019-09-06 | Equipment and method for adopting coal core for low-temperature gas medium cooling drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649979A (en) * | 2020-06-12 | 2020-09-11 | 煤科集团沈阳研究院有限公司 | Nitrogen low-temperature positive-pressure remote rapid gas content sampling device and method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203161286U (en) * | 2013-04-10 | 2013-08-28 | 曹召丹 | Air-pressing and cooling powder-discharging device by adopting nitrogen in down holes |
| JP5439428B2 (en) * | 2011-04-07 | 2014-03-12 | フロンティア・ラボ株式会社 | Cooling and concentration apparatus and cooling jig used therefor |
| CN103776659A (en) * | 2013-12-31 | 2014-05-07 | 河南理工大学 | Negative-pressure draw-out type coal layer gas content spot sampling method |
| CN103853203A (en) * | 2014-03-19 | 2014-06-11 | 中国科学院高能物理研究所 | Cooling device |
| CN104764625A (en) * | 2015-04-14 | 2015-07-08 | 河南理工大学 | Low-temperature coal seam sampling device and method |
| CN106124243A (en) * | 2016-06-16 | 2016-11-16 | 重庆大学 | Coal seam gas-bearing capacity measures advanced freezing sampling method |
| CN206216927U (en) * | 2016-11-28 | 2017-06-06 | 重庆星源玻璃器皿有限责任公司 | For the device of glass punching |
| CN207080811U (en) * | 2017-07-31 | 2018-03-09 | 华中科技大学 | A kind of liquid nitrogen buffering liquid supply device of multichannel rate controlling |
| CN109085087A (en) * | 2018-08-17 | 2018-12-25 | 中煤科工集团重庆研究院有限公司 | Full-automatic device and method for quickly measuring gas desorption index and drilling cuttings amount of drilling cuttings |
| CN109443859A (en) * | 2018-12-25 | 2019-03-08 | 西安科技大学 | A kind of negative pressure low temperature coal seam gas-bearing capacity measurement sampler |
-
2019
- 2019-09-06 CN CN201910840333.8A patent/CN110566147A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5439428B2 (en) * | 2011-04-07 | 2014-03-12 | フロンティア・ラボ株式会社 | Cooling and concentration apparatus and cooling jig used therefor |
| CN203161286U (en) * | 2013-04-10 | 2013-08-28 | 曹召丹 | Air-pressing and cooling powder-discharging device by adopting nitrogen in down holes |
| CN103776659A (en) * | 2013-12-31 | 2014-05-07 | 河南理工大学 | Negative-pressure draw-out type coal layer gas content spot sampling method |
| CN103853203A (en) * | 2014-03-19 | 2014-06-11 | 中国科学院高能物理研究所 | Cooling device |
| CN104764625A (en) * | 2015-04-14 | 2015-07-08 | 河南理工大学 | Low-temperature coal seam sampling device and method |
| CN106124243A (en) * | 2016-06-16 | 2016-11-16 | 重庆大学 | Coal seam gas-bearing capacity measures advanced freezing sampling method |
| CN206216927U (en) * | 2016-11-28 | 2017-06-06 | 重庆星源玻璃器皿有限责任公司 | For the device of glass punching |
| CN207080811U (en) * | 2017-07-31 | 2018-03-09 | 华中科技大学 | A kind of liquid nitrogen buffering liquid supply device of multichannel rate controlling |
| CN109085087A (en) * | 2018-08-17 | 2018-12-25 | 中煤科工集团重庆研究院有限公司 | Full-automatic device and method for quickly measuring gas desorption index and drilling cuttings amount of drilling cuttings |
| CN109443859A (en) * | 2018-12-25 | 2019-03-08 | 西安科技大学 | A kind of negative pressure low temperature coal seam gas-bearing capacity measurement sampler |
Non-Patent Citations (1)
| Title |
|---|
| 王俭: "《宁东煤炭基地高效开发核心技术》", 30 September 2017 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649979A (en) * | 2020-06-12 | 2020-09-11 | 煤科集团沈阳研究院有限公司 | Nitrogen low-temperature positive-pressure remote rapid gas content sampling device and method |
| CN111649979B (en) * | 2020-06-12 | 2021-07-16 | 中煤科工集团沈阳研究院有限公司 | Nitrogen low-temperature positive-pressure remote rapid gas content sampling device and method |
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